1 ===============================================
2 Driver documentation for yealink usb-p1k phones
3 ===============================================
8 The p1k is a relatively cheap usb 1.1 phone with:
10 - keyboard full support, yealink.ko / input event API
11 - LCD full support, yealink.ko / sysfs API
12 - LED full support, yealink.ko / sysfs API
13 - dialtone full support, yealink.ko / sysfs API
14 - ringtone full support, yealink.ko / sysfs API
15 - audio playback full support, snd_usb_audio.ko / alsa API
16 - audio record full support, snd_usb_audio.ko / alsa API
18 For vendor documentation see http://www.yealink.com
24 The current mapping in the kernel is provided by the map_p1k_to_key
27 Physical USB-P1K button layout input events
34 pickup C hangup enter, backspace, escape
40 The "up" and "down" keys, are symbolised by arrows on the button.
41 The "pickup" and "hangup" keys are symbolised by a green and red phone
48 The LCD is divided and organised as a 3 line display::
50 |[] [][] [][] [][] in |[][]
51 |[] M [][] D [][] : [][] out |[][]
54 NEW REP SU MO TU WE TH FR SA
56 [] [] [] [] [] [] [] [] [] [] [] []
57 [] [] [] [] [] [] [] [] [] [] [] []
60 Line 1 Format (see below) : 18.e8.M8.88...188
61 Icon names : M D : IN OUT STORE
62 Line 2 Format : .........
63 Icon name : NEW REP SU MO TU WE TH FR SA
64 Line 3 Format : 888888888888
68 From a userspace perspective the world is separated into "digits" and "icons".
69 A digit can have a character set, an icon can only be ON or OFF.
73 '8' : Generic 7 segment digit with individual addressable segments
75 Reduced capability 7 segment digit, when segments are hard wired together.
76 '1' : 2 segments digit only able to produce a 1.
77 'e' : Most significant day of the month digit,
78 able to produce at least 1 2 3.
79 'M' : Most significant minute digit,
80 able to produce at least 0 1 2 3 4 5.
83 '.' : For example like AM, PM, SU, a 'dot' .. or other single segment
90 For userland the following interfaces are available using the sysfs interface::
93 line1 Read/Write, lcd line1
94 line2 Read/Write, lcd line2
95 line3 Read/Write, lcd line3
97 get_icons Read, returns a set of available icons.
98 hide_icon Write, hide the element by writing the icon name.
99 show_icon Write, display the element by writing the icon name.
101 map_seg7 Read/Write, the 7 segments char set, common for all
102 yealink phones. (see map_to_7segment.h)
104 ringtone Write, upload binary representation of a ringtone,
105 see yealink.c. status EXPERIMENTAL due to potential
106 races between async. and sync usb calls.
112 Reading /sys/../lineX will return the format string with its current value.
120 Writing to /sys/../lineX will set the corresponding LCD line.
122 - Excess characters are ignored.
123 - If less characters are written than allowed, the remaining digits are
125 - The tab '\t'and '\n' char does not overwrite the original content.
126 - Writing a space to an icon will always hide its content.
130 date +"%m.%e.%k:%M" | sed 's/^0/ /' > ./line1
132 Will update the LCD with the current date & time.
138 Reading will return all available icon names and its current settings::
164 Writing to these files will update the state of the icon.
165 Only one icon at a time can be updated.
167 If an icon is also on a ./lineX the corresponding value is
168 updated with the first letter of the icon.
170 Example - light up the store icon::
172 echo -n "STORE" > ./show_icon
178 Example - sound the ringtone for 10 seconds::
180 echo -n RINGTONE > /sys/..../show_icon
182 echo -n RINGTONE > /sys/..../hide_icon
188 Sound is supported by the ALSA driver: snd_usb_audio
190 One 16-bit channel with sample and playback rates of 8000 Hz is the practical
193 Example - recording test::
195 arecord -v -d 10 -r 8000 -f S16_LE -t wav foobar.wav
197 Example - playback test::
205 :Q: Module yealink compiled and installed without any problem but phone
206 is not initialized and does not react to any actions.
207 :A: If you see something like:
208 hiddev0: USB HID v1.00 Device [Yealink Network Technology Ltd. VOIP USB Phone
209 in dmesg, it means that the hid driver has grabbed the device first. Try to
210 load module yealink before any other usb hid driver. Please see the
211 instructions provided by your distribution on module configuration.
213 :Q: Phone is working now (displays version and accepts keypad input) but I can't
214 find the sysfs files.
215 :A: The sysfs files are located on the particular usb endpoint. On most
216 distributions you can do: "find /sys/ -name get_icons" for a hint.
219 Credits & Acknowledgments
220 =========================
222 - Olivier Vandorpe, for starting the usbb2k-api project doing much of
223 the reverse engineering.
224 - Martin Diehl, for pointing out how to handle USB memory allocation.
225 - Dmitry Torokhov, for the numerous code reviews and suggestions.